Crystl: Supplement & Fasting

Crystl Health helps you privately organize and track your supplement routine.

SUPPLEMENT TRACKING
• Record the supplements you use, including the amount shown on your product label, schedule, inventory, and cost
• Mark items as taken from a simple daily checklist
• Use barcode scanning and on-device OCR to make entering label information faster
• Browse a built-in supplement catalog or add your own items

ROUTINE NOTES
• View general, fixed-reference notes about selected supplement pairs
• See general information about common timing and meal habits
• Set reminders for the schedule you choose

PERSONAL LOGS
• Review adherence history and streaks
• Record mood, energy, symptoms, fasting periods, lab values, weight, and blood pressure
• Optionally record menstrual-cycle dates and view estimates based on your own history
• Optionally connect Health Connect, Oura, or Whoop data

TOOLS
• Home-screen widgets for supplement progress, fasting time, and a research-based biological-age estimate
• Export, restore, or permanently delete your locally stored records

PRIVACY
Core tracking records are stored on your device and no account is required. Wearable tokens are encrypted at rest. Advertising and crash-reporting providers may process limited device or technical data as described in the privacy policy. Your health records are never used for ads.

The free version contains ads. An optional one-time purchase removes ads. There is no subscription.

IMPORTANT HEALTH INFORMATION
Crystl Health is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. It provides general wellness information and personal record-keeping tools, not medical advice. It does not suggest doses. Supplement-pair notes are based on a limited fixed list, do not check prescription drugs, and are not a safety assessment. Biological-age, cycle, and fertile-window results are estimates and are not diagnostic tests. Never use cycle or fertile-window estimates for contraception or fertility planning. Consult a qualified healthcare professional before starting, stopping, or changing supplements, fasting, medication, or other health decisions.

Recent changes:
Library updates and stability fixes.